In case a book entry has 'count' field set to 0
we crash. Spotted by Clang's static analyzer.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
// Choose book move according to its score. If a move has a very
// high score it has higher probability to be choosen than a move
// with lower score. Note that first entry is always chosen.
- if ( (RKiss.rand<unsigned>() % sum < e.count)
+ if ( (sum && RKiss.rand<unsigned>() % sum < e.count)
|| (pickBest && e.count == best))
move = Move(e.move);
}